It is very pleasant to entertain a new idea, a new notion or concept to think about and to look at the world with. Indeed, it can have the exciting and intoxicating feel of discovering hidden treasure.
Unfortunately, most ideas are bad - wrong, misleading, dangerous, or of very limited use or relevance. Even more unfortunately, that doesn't prevent them from gaining our interest and enthusiasm. The problem is that getting an idea is just a matter of understanding it (or thinking that you do) and this is just as easy in the case of bad ideas as it is for good ones. In contrast, checking the quality of ideas by interrogating the arguments for them is laborious and distinctly unrewarding - and so avoided as much as possible. The result is that the world is drowning in bad ideas and their dreadful consequences, from conspiracy theories to religions to academic bloopers like critical race theory.